Warm Pesto Lentils with Feta and Spinach | The Fast 800

Name: Warm Pesto Lentils with Feta and Spinach | The Fast 800
Cuisine: Italian, European, Mediterranean
Ingredients: Calories per serve 575; 1 tbsp extra virgin olive oil; 1 onion, diced; 100g firm feta, diced; 4 balls frozen spinach (about 100g), defrosted; 250g cooked lentils , from pack or drained from a tin; 2 tbsp pine nuts or cashews (or any seeds or nuts – best toasted); ½ small jar of pesto (about 50g)