Sheet-Pan Chicken Saltimbocca with Roasted Potatoes and Crispy Kale

Position racks in upper and lower thirds of oven and preheat to 425°F. Arrange chicken cutlets in a single layer on rimmed baking sheet and season with 1/2 tsp. pepper. Place 1 sage leaf on top of each cutlet, then wrap each in 1 slice of prosciutto, starting from the top and wrapping in a single layer, making sure cutlet stays flat.

Finely chop remaining 4 sage leaves and toss with potatoes, garlic, 1 Tbsp. oil, 1/2 tsp. salt, and 1/2 tsp. pepper on second rimmed baking sheet.

Cook chicken in upper third of oven and potatoes in lower third until prosciutto is crisp and an instant-read thermometer inserted into the thickest part of chicken registers 165°F, 12-14 minutes.