Μπέργκερ με κόκκινα φασόλια
onion, finely chopped • garlic, grated • red beans, drained (about 240 grams) • ground flaxseed • water • parsley, finely chopped • smoked paprika • rolled oats (about 60 grams) • olive oil • Salt & freshly ground pepper • burger buns, halved • tomato, thickly sliced •