Deseed and slice the plum tomatoes. Finely slice the red onions. Roughly chop the coriander. Shred the baby gem lettuces.
- 1 Heat the oil in a saucepan, add the mince and cook on a high heat for 8-10 minutes. Stir in the fajita mix and simmer for 5 minutes, then add the tomatoes and cook for another 10-15 minutes. Season to taste.
- 2 Make the salsa by mixing the fresh tomatoes, red onion and coriander.
- 3 Toast the tacos in a pan for 30 seconds on each side.
- 4 Spoon the chilli into the tacos, then top with baby gem, slices of avocado and salsa. Serve with sour cream and a squeeze of lime.