Black Bean Tostadas

Ingredients

• white onion, diced into small pieces
• olive oil
• jalapeño or more if you like it spicier
• garlic cloves minced
• ground cumin
• ground cinnamon
• x400g tins of black beans
• salt and pepper
• to serve
• tostadas (corn tortillas that are crispy. You can buy them in the Mexican grocer
• feta cheese crumbled or cut in small cubes
• avocados, roughly chopped
• Cilantro
• Lime wedges