Zucchini, Yellow Squash and Tomato Tian with Caramelized Onions

Zucchini, Summer Squash and Tomato Tian with Caramelized Onions

adapted from America's Test Kitchen

Try to find tomatoes, squash and zucchini that are about the same diameter.

Makes 4 servings                                                                 1 WW pts / serving

Cooking spray
1 onion, halved and sliced 1/4 inch thick (about 1 cup)
Kosher salt and freshly ground black pepper

1/4 cup water, divided, more if needed
1 small garlic cloves, minced
1/3 lb. zucchini, trimmed and sliced 1/4 inch thick
1/3 lb. summer squash, trimmed and sliced 1/4 inch thick
1/3 lb. plum tomatoes, cored and sliced 1/4 inch thick
1/3 tsp. minced fresh thyme
1 tsp. olive oil, divided
2 Tbsp. + 2 Tsp. shredded Gruyère cheese, about 2/3 ounces

1. Preheat the oven to 375 degrees. 
2. Line an 8" x 8" baking pan with foil; Coat it with cooking spray; Set aside.
3. To caramelize the onions without oil, Place the onions and 2 Tbsp. of water in a pan; season with salt and pepper to taste. Cook over medium heat until the water is evaporated and the onions start to stick to the pan. Add 1 Tbsp. of water to the pan and stir. The onions will start to brown. Repeat with additional water until the onions are at your preferred level of caramelization.
4. Stir in garlic and cook until fragrant, about 30 seconds; Spread onion mixture on bottom of prepared baking sheet.
5. Shingle the zucchini, tomatoes and summer squash alternating into single layer of tightly fitting rows on top of the onions. 
6. Sprinkle with thyme, drizzle with 1 tsp. oil, and season with salt and pepper. 
7. Cover dish with foil and bake until vegetables are tender, about 30 minutes.
8. Remove foil, sprinkle Gruyère over top, and continue to bake until bubbling around edge and lightly browned on top, 20 to 30 minutes longer. 
9. Let rest for 10 minutes before serving.

Enjoy!