Preheat the oven to 350 degrees. Lightly mist a 9x13 casserole dish with cooking spray and set aside.
Place the broccoli florets in a microwave-safe bowl and cover the bowl with a damp paper towel. Microwave for 2-3 minutes on high until lightly tender. Spread the broccoli evenly across the bottom of the baking dish.
Lightly mist a large skillet with cooking spray and bring over medium-high heat. Arrange the chicken cutlets into a single layer in the skillet and cook for about 2 minutes until the bottom is seared golden. Flip the cutlets and sear for another 2 minutes until the other side is golden as well. Do not worry if the chicken is not cooked through, you’re just searing the outside here, it will cook in the oven. Place the chicken breasts in a single layer on top of the broccoli in the casserole dish.
In a mixing bowl, stir together the cream of chicken soup, mayonnaise, curry powder and lemon juice until well combined. Spread the sauce evenly across the top of the other ingredients in the casserole dish. Sprinkle the cheese on top and follow with the bread crumbs.
Place in the oven and bake for 35-40 minutes until the chicken is cooked through and the sauce is bubbly.