This step is entirely optional but delicious when topping Huevos Rancheros! Warm 2 teaspoons olive oil in a small saucepan. Add 1 teaspoon ground cumin, one can of drained and rinsed pinto or black beans and 1/4 cup water. Stir, cover, and cook for 5 minutes. If you want, mash half of the beans in the pan and cook uncovered for 2 to 3 minutes more or until thickened.Remove from the heat, stir in salt and pepper to taste, and 1/2 teaspoon lime juice. If the beans seem dry, add a splash of water and stir to combine.