Cat Cora's Tex-Mex Tuna Casserole

Like a lot of people I grew up with Tuna Casserole and to be honest I really like it. This is a fun variant adapted from Cat Cora's book Classics.

Cook about 250gms of Fusilli
Saute 2 diced brown onions
2 finely cut celery stalks
1 cup sweet corn kernels

Combine with 1 tin of tuna (size large)
1 tub non fat Greek yogurt
1 jar salsa
150gms low fat sour cream
Diced coriander
1 cup grated cheese

Combine in a baking dish topping with extra cheese
Bake until bubbling