Ingredients: rice, black beans, eggs, onion, garlic.
The night before, let the beans soak. Before cooking, change the water on the beans. Heat until boiling, change the water again, add salt and let the beans boil slowly for 1.5-3h.
Slice the onion and garlic in small chunks. Fry in a shallow pot, in just a bit of olive oil. Add some oregano or whatever spices you enjoy. When it is fried to your taste, add the rice. Mix it for a bit, and then add 2.5 cups of water for each cup of rice.
Let it boil until the water doesn’t cover the rice, then turn the heat down until it’s just evaporating water (I like my rice dry). Meanwhile, fry a couple eggs, use a strainer to get the beans out, and add everything to the rice (or you can serve the eggs on the plate).
• 1kg of rice: 2€ • 1kg black beans: 4€ • A carton of eggs: 2.5€
YMMV but this is tasty and pretty inexpensive, if you don’t count the 2h of boiling beans, but I prefer them on the soft side :P