Warm the almonds a little in a dry pan, then smash them up in a pestle and mortar or whiz them in a food processor until you have a coarse powder consistency. Put them into a bowl. Bash the garlic and the basil separately in the mortar and mix with the almonds, adding the pecorino or Parmesan, a good glug of olive oil, and some salt and pepper. Add the tomatoes and really scrunch them with your hands into the almond mixture until they have completely broken up. Loosen with a little extra olive oil and toss with your hot drained pasta. Check the seasoning, divide onto 4 plates, and spoon any sauce that remains in the pan over the top.