To prepare a pineapple vegetarian fried rice beans and grains recipe, you will first need to prepare the following ingredients: Peel and cut the pineapple into small pieces. Place the chopped pineapple in the bowl with the rice and beans. Add 1 tablespoon of vegetable oil to the skillet and heat over medium-high heat until the oil is shimmering. Remove the pan from the heat and stir in 2 tablespoons of the sour cream. Stir in 1 teaspoon of kosher salt. Cook the mixture for 2 to 3 minutes or until it begins to thicken. Serve with your favorite vegetable or bean dish.