Drizzle a baking pan (with 1" sides) with about 1 tablespoon olive oil. Brush over the pan to grease the entire bottom.
Thick chicken breasts will take a long time to bake, so slice the chicken breasts in half so that they are thinner. We had 2 large chicken breasts and cut them into 4 thinner half slices.
Place the chicken breast on the baking sheet with about 2" between each piece.
Arrange the bite size potatoes and zucchini pieces around the chicken on the pan in an even layer.
Squeeze the juice of one lemon over the chicken.
Crush 1 teaspoon of dried rosemary over the whole pan, chicken and vegetables.
Sprinkle with salt and pepper.
Drizzle the remaining 2 tablespoons of olive oil over the entire pan of potatoes and chicken.
Bake for 15 minutes, then test the potatoes and chicken. Potatoes should be getting soft. Test the temperature of the chicken. The chicken is done when the center is 165ºF. At this point, if it is almost done, turn the oven broiler on high for 3-5 minutes. Watch closely and turn the broiler temp down if needed. Food can burn quickly on broil. Broiling will help the chicken and potatoes brown slightly on top.
The total baking time will be around 20-25 minutes, but this will depend on how thick the chicken is and how big the pieces of potatoes are. Lower the oven temperature as needed, but don't turn it any higher.
Serve immediately.
Store any leftovers in the refrigerator in an airtight container for up to 3 days.
Notes
Refer to the article above for more tips and tricks.The calories shown are based on the recipe serving 4, with 1 serving being 1/4 of the chicken/potatoes. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information. The information in the nutrition box are calculated through a program and there is room for error. If you need an accurate count, I recommend running the ingredients through your favorite nutrition calculator.**