One of my favorite quick and easy dinners is pesto chicken. I like to make pesto myself (that is a post for another day) but it is easy to just buy pre-made pesto from the store (I like Costco's Kirkland brand).
-Chicken Breasts cut in half lengthwise (or chicken tenderloins but I usually only have chicken breasts on hand)
-Pre-made pesto (check your ingredients to make sure it doesn't have anything funky added)
-Mozzarella and Parmesan cheese (optional)
Line a baking sheet with tinfoil. Preheat oven to 350. Place chicken on baking sheet, coat the top of the chicken with pesto. bake in the oven for 20 minutes or so (check after 15). Once the chicken is cooked through, turn your broiler on high, put cheese on top of the chicken (I like a mix of mozz and parm) and let the cheese melt. I like to serve mine over zucchini noodles (zoodles).