Preheat the oven to 375 F. Half petite potatoes and add to a bowl with tomatoes, toss with 1.5 tbsp olive oil, salt and pepper. In a bowl toss thighs with 1.5 olive oil to coat, sprinkle with salt and pepper with herbs or seasonings of your choice.
Line 9" x 13" baking dish (or casserole dish) with non stick foil, pour vegetables with oil in bowl, on with chicken embedded in them with a bit of space between the meat. Pour remaining 1 tbsp olive oil over the top and sprinkle salt and pepper over the top.
Cover the baking dish with foil. Bake for 15 minutes, then remove foil, and then another 15 - 25 minutes without foil until the thickest part of the largest thigh reaches 165 F and potatoes are fork tender.
Remove, cover with the foil to keep warm and let rest for 10 minutes before slicing meat and serving with a squeeze of lemon if desired.