Sausage & Lentil Casserole

Preheat oven to 400°F. Coat a 1-quart casserole or loaf pan with cooking spray.

Heat oil in a medium skillet over medium heat. Add sausage and onion; cook, stirring, until the onion softens, about 5 minutes. Add lentils, spinach, broth and oregano. Increase heat to medium-high and cook, stirring often, until heated through, about 3 minutes. Stir in rice and pepper. Transfer the mixture to the prepared baking dish and cover with foil. Bake until the rice is tender, 30 to 35 minutes. Top with cheese and bake, uncovered, until the cheese melts, about 2 minutes more.