Start by chopping the onion, garlic and mushrooms. I was lazy so threw them all in my chopper, which resulted into them being minced, you can also go for a rougher chop.
Sauté these for about 8 minutes over low/medium heat before adding the spices, bell pepper, chickpeas and optionally the chopped longyard beans. Cook this over medium/low for about 15 minutes while stirring regularly