
Heat the oven to 375°F (190°C) with a rack in the middle.
Whisk the cream of chicken soup, broth, lemon juice and drained capers in a bowl for about 1 minute, until no lumps of soup remain.
Spread the dry orzo in a 9-inch (23 cm) square baking dish. Pour the sauce over it and stir gently, then press any grains poking above the liquid back under it.
Slice each chicken breast horizontally into 2 or 3 cutlets about 1/2 inch (1.3 cm) thick and pat them dry. Arrange them in a single layer on the orzo, then season with the garlic powder, salt and pepper.
Sprinkle the Parmesan and panko over the chicken, dot with the cubed butter and lay half of the lemon slices on top. Cover the dish tightly with foil.
Bake covered for 30 minutes, until the liquid bubbles at the edges and the orzo has swelled.
Remove the foil and bake for 12 to 15 minutes more, until the panko is golden brown, the sauce is bubbling and a thermometer in the thickest cutlet reads 165°F (74°C).
Let the dish stand for 5 minutes so the sauce tightens. Garnish with the parsley and the remaining lemon slices.
Approximate values per serving.
Recipe from Home Recipes: https://www.hmrecipes.com/chicken-piccata-orzo-casserole/