You could also substitute a can of peas and carrots which gives it a bit more peas, but make sure you drain it well.
Mix the drained tuna, soup and vegetables together and pour into a small greased casserole dish, pie pan or individual oven safe dishes.
Top with either pie crust, or with biscuits cut up (if making individual ones, one biscuit each).
Then bake in a preheated 350 degree oven for 25 minutes.
If making one large pie, it take a bit longer, around 40-45 minutes.
I’ve found if using pie crust, you may need to broil it for a few seconds at the end to make it golden, and if using the biscuit top, it helps to bake on a lower rack in the oven so it gets done before the tops of the biscuits get too brown.