1: Start boiling the pasta in very salty water.
2: Meanwhile, dice the chilli and garlic and sauté in olive oil for a couple of minutes.
3: Add the frozen peas to the sauté.
4: Pour in the drained cooked pasta, reserving some pasta water.
5: Stir in the pesto and pasta water until deliciously saucy.
6: Finish with a big squeeze of lemon.