Zucchini & Onion Gratin

Steps

1. 1

   Preheat the oven to 375*.

2. 2

   In a large cast iron skillet, warm up the oil to medium heat. Then, add in the onion, tomato paste, lemon grind, thyme, salt, and pepper. Let this cook for about 5 minutes, then add in the zucchini. Let this cook an additional 5 minutes until the onion and zucchini are soft and well coated with the oil.

3. 3

   Spray a dish with non stick cooking spray, then carefully pour the mixture into the dish. Top it with cheese and cover with foil. Bake in the oven for 25 minutes.

4. 4

   Remove it carefully from the oven, remove the foil.

5. 5

   Turn the broiler on high, then carefully place the dish uncovered back into the oven for about 1-2 minutes until lightly browned on top.