To prepare a two bean and cheddar cheese pie beans and grains recipe, you'll first need to gather your ingredients. You will need: 2 lbs. cannellini beans 1 lb. brown rice 1 cup quinoa 1 1/2 cups rolled oats 1 teaspoon salt 1 tablespoon ground black pepper Instructions: Preheat the oven to 350 degrees F. Line an 8x8x2-inch baking pan with foil and set aside. Heat the olive oil over medium-high heat until shimmering. Add the onion and cook until softened, about 5 minutes. Stir in the flour, milk, salt and pepper. Pour the mixture into the prepared pan and stir to combine. Bake the pie for 20 to 25 minutes, or until the crust is golden brown and the filling is bubbly. Serve warm.