This super-simple one-pot healthy chicken casserole has a rich and spicy tomato sauce studded with black olives, with spinach stirred in just before serving. Ingredients 1 tsp olive oil 1 large red onion, chopped 1 large red pepper, seeds removed, thinly sliced 1 red chilli, diced 3 garlic cloves, sliced 1 tsp hot smoked paprika […]