POUR THE OIL INTO A WIDE, SHALLOWISH FRYING PAN, CASSEROLE OR WOK, AND PUT ON A MEDIUM HEAT. ADD THE FINELY CHOPPED ANCHOVIES AND COOK FOR ABOUT 3 MINUTES, PRESSING AND PUSHING WITH A WOODEN SPOON, UNTIL THE ANCHOVIES HAVE ALMOST “MELTED”, THEN ADD THE GARLIC AND CHILLI FLAKES (OR SLICED THEN DICED JALAPEÑOS) AND COOK, STIRRING FOR ANOTHER MINUTE. ADD DICED TOMATOES AND SEASON WITH SALT AND GROUND BLACK PEPPER. SIMMER WHILE WAITING FOR THE PASTA TO COOK.