Preheat your oven to 425°F (220°C). Position the rack in the middle of the oven for even heat distribution. Line a large rimmed baking sheet with parchment paper for easy cleanup. If you don't have parchment, lightly oil the pan to prevent sticking.

Pro tip: A hot oven is crucial for proper caramelization. Don't be tempted to use a lower temperature, as this won't give you those gorgeous golden edges.

Scrub the sweet potatoes and beets thoroughly under running water. Peel the sweet potatoes, cutting off any rough spots or eyes. Cut them into 1-inch cubes, trying to keep the pieces uniform for even cooking.

For the beets, peel them using a vegetable peeler or paring knife. Remove the tops and roots, then cut into 1-inch pieces roughly the same size as the sweet potato cubes. Be careful – beet juice stains everything! Wear gloves if you're worried about staining your hands.

Time-saving tip: Many grocery stores now sell pre-peeled and cubed beets in the produce section if you're short on time.

In a small bowl, combine 3 tablespoons of extra virgin olive oil with 4-5 minced garlic cloves. Let this mixture sit while you prepare the vegetables. This allows the garlic to infuse the oil, creating a more pronounced garlic flavor throughout the dish.

Flavor boost: Add a pinch of red pepper flakes to the oil if you like a subtle heat in your roasted vegetables.

Place the cubed vegetables in a large mixing bowl. Pour the garlic oil over them, tossing well to ensure every piece is coated. Season with 1 teaspoon of kosher salt and ½ teaspoon of freshly ground black pepper. Add the leaves from 2 sprigs of fresh rosemary and 4-5 sprigs of fresh thyme.

The key here is to be generous with your seasoning. The vegetables will absorb a lot of flavor during roasting, so don't be shy with the herbs and spices.

Herb tip: Gently bruise the herb leaves between your fingers before adding to release their essential oils.

Spread the seasoned vegetables in a single layer on your prepared baking sheet. Don't overcrowd the pan – if the vegetables are too close together, they'll steam instead of roast. Use two pans if necessary.

Make sure there's space between the pieces so hot air can circulate properly. This is crucial for achieving those crispy, caramelized edges.

Space matters: If your vegetables are crowded, they'll release moisture and won't brown properly.

Place the baking sheet in the preheated oven and roast for 25-30 minutes. Halfway through cooking time, use a spatula to flip and redistribute the vegetables. This ensures even browning on all sides.

The vegetables are done when they're tender when pierced with a fork and have golden-brown edges. The beets will deepen in color, and the sweet potatoes will develop gorgeous caramelized spots.

Doneness test: A fork should slide easily through the largest piece of vegetable with little resistance.

Remove the vegetables from the oven and immediately sprinkle with fresh chopped herbs – I like to add a combination of parsley and additional rosemary and thyme. The residual heat will gently warm the herbs, releasing their aromatic oils.

Let the vegetables rest for 3-5 minutes before serving. This allows the flavors to meld and the vegetables to cool slightly to the perfect serving temperature.

Fresh is best: Always add fresh herbs after roasting to maintain their vibrant color and flavor.

Transfer the warm roasted vegetables to a serving platter. They can be served as-is for a simple, elegant presentation, or dressed up with crumbled goat cheese, toasted nuts, or a drizzle of balsamic glaze.

These vegetables are delicious hot, warm, or at room temperature, making them perfect for family dinner or entertaining. The leftovers are fantastic in salads or grain bowls the next day!

Serving suggestion: Serve alongside roasted chicken, pork tenderloin, or as a hearty vegetarian main dish with crusty bread.

Refrigeration

Store cooled vegetables in an airtight container in the refrigerator for up to 5 days. Line the container with paper towels to absorb excess moisture and prevent sogginess. For best results, store without any additional garnishes like fresh herbs or cheese.

Quick tip: Store in individual portions for grab-and-go meals throughout the week.

Freezing

These vegetables freeze well for up to 3 months. Let them cool completely, then spread in a single layer on a baking sheet and freeze for 2 hours. Transfer to freezer-safe bags or containers. This prevents them from freezing into one large clump.

Note: The texture may be slightly softer when thawed, but they're still delicious in soups or pureed for baby food.

Reheating

Reheat in a 350°F oven for 10-15 minutes, or until heated through. You can also reheat in a skillet over medium heat with a splash of olive oil. Avoid microwaving if possible, as it can make the vegetables soggy. For a quick option, reheat under the broiler for 3-5 minutes, watching carefully to prevent burning.

Make-ahead tip: Prep all vegetables up to 2 days ahead and store separately. Season and roast when ready to serve.