At least 2 hours before serving, make the toasts. Heat oven to 350°F. Spray 15x10x1-inch pan with cooking spray. Bake French bread loaves 24 to 26 minutes or until browned. Cool completely, at least 30 minutes. Cut each loaf into 1/2-inch slices. Brush slices on both sides, using 4 tablespoons melted butter. Bake half of the slices at a time on pan 15 to 20 minutes, turning once, until deep golden brown and crispy.