3 tbsp olive oil, plus more for drizzling 

1 medium yellow onion, chopped 

Salt

3 cloves garlic, minced

1 tbsp ground cumin 

1 tsp harissa, or more to taste (different brands vary in spiciness) 

¼ tsp smoked paprika

Black pepper 

Crushed red pepper

1 tbsp tomato paste 

2 x 400g tins  chopped tomatoes 

1 tsp sugar

3-4 eggs