Preheat the oven: Set your oven to 375°F (190°C). Line a large sheet pan with parchment or lightly oil it.
Pat the turkey dry: Use paper towels to remove surface moisture.
Dry skin or surface helps the rub cling and promotes browning.
Mix the seasoning: In a small bowl, combine salt, pepper, garlic powder, onion powder, paprika, dried thyme, and the zest of half a lemon.
Season the turkey: Rub 2 tablespoons olive oil over the turkey breast, then coat it evenly with the seasoning mix. Tuck any thin edges under so it roasts evenly.
Prepare the green beans: Toss beans with 1 tablespoon olive oil, a pinch of salt and pepper, and the minced garlic if using. Spread them on the sheet pan in a single layer, leaving space for the turkey.
Arrange on the pan: Place the turkey breast on the sheet pan, skin-side up if your cut has skin.
Nestle the beans around it without crowding.
Bake: Roast for 35–50 minutes, depending on the size of your turkey breast. Begin checking internal temperature at 35 minutes.
Check doneness: Use an instant-read thermometer in the thickest part. Pull the turkey at 160°F (71°C); it will rise to 165°F (74°C) as it rests.
Optional butter finish: In the last 5 minutes, dot the turkey with butter or baste with pan juices for extra richness.
Rest the meat: Transfer the turkey to a cutting board, tent loosely with foil, and rest for 10–15 minutes. This keeps it juicy and easier to slice.
Brighten the beans: Squeeze a little lemon over the beans, toss, and taste for seasoning.
Add a pinch more salt if needed.
Slice and serve: Slice turkey against the grain. Garnish with chopped parsley and serve with lemon wedges.