Dice the cherry tomatoes and red onion as finely as you can, and add to the jar of salsa, mixing well.
Spoon 1/2 the salsa mix into the middle of your casserole dish.
Place 1/2 the tortilla chips on the base of the casserole dish surronding (but not covering) the salsa.
Dice the jalepenos into small chunks and sprinkle half of them over the nachos.
Lighlty dollop a few teaspoons of the salsa randomly over the tortilla chips.
Mix the mozarella cheese and cheddar cheese together, and sprinkle 1/3 over the top of the tortilla chips.
Layer the second half of the tortilla chips over the first (again not covering the salsa).
Sprinkle the rest of the jalepenos on top, and dollop the remaining salsa randomly on top.
Sprinkle the rest of the cheese all over the nachos and place under the grill on a medium heat for 5-10 minutes until the cheese is melted and bubbling.
Dollop the sour cream in the middle.
Finely chop the coriander leaves and sprinkle on top.
And serve!