Black Bean Burgers - Cooking like a Boss

2 ⁵⁄₈ red onion

7 soft rolls	sliced	spread on both sides						layer
7 tablespoons 0.105 l 105 ml 21 tsp 0.444 cup 0.185 pint natural yoghurt
¹⁄₂ of the salsa
1 ³⁄₄ mango	destone and finely slice
1 ³⁄₄ avocado	destone and finely slice
7 sprigs of fresh coriander
burgers
preheat oven to 200*c						roast for 25 minutes	add then keep in oven for 5 more minutes
1 ³⁄₄ red onion	blend until fine	pulse	shape into 7 burgers	rub all over	dust
350 g 0.35 kg 0.772 lb 12.3 oz mixed mushrooms
175 g 0.175 kg 0.386 lb 6.17 oz rye bread
1 ³⁄₄ teaspoon 0.009 l 8 ³⁄₄ ml ⁷⁄₁₂ tbsp 0.037 cup 0.015 pint ground coriander
700 g 0.7 kg 1.54 lb 24.7 oz tin of black beans	drain
salt
pepper
oil
ground coriander
70 g 0.07 kg 0.154 lb 2.47 oz mature Cheddar	grated
remaining salsa