Peel and dice onion, mince garlic and dice bell pepper.
Slice all 4 of the chicken sausages into ΒΌ inch sized slices.
Add the 2 tbsp olive oil and diced onion to the pressure cooker. Put on the saute feature and when you hear it gently sizzling, stir often until onions are translucent about 2-3 minutes.
Add garlic, and sliced sausage and saute 1-2 minutes or until little some of the edges get golden on the sausage.