update recipe to use number of onions instead of grams

Rajma_Masala.yaml

@@ -2,7 +2,7 @@ feeds: 5
 ingredients:
 - Red Lentils 1 Cup (metric)
 - Coconut Oil 2 Tbsp (metric)
-- Onions 150 g
+- Onions 1 Pieces
 - Canned Tomatoes 800 g
 - Ginger 75 g
 - Garlic 75 g