Try this Chicken Pot Pie recipe
Canned vegetables carry high surface moisture that interferes with thickening agents. Strain the contents through a fine-mesh colander for at least five minutes, shaking gently to remove trapped liquid. Whisking the condensed soup and milk thoroughly before combining prevents lumps and ensures the sauce binds properly when heated. Fold the drained vegetables and diced chicken into the soup base gently to distribute the solids without breaking them down further.
Thaw frozen pie crusts completely in the refrigerator for two hours before handling to prevent cracking along the edges. Crimp the top and bottom crusts together tightly with a fork or fluted fingers to seal the perimeter and trap steam inside. Cut four one-inch slits into the top crust to allow excess steam to escape, preventing the pastry from bubbling unevenly. Bake the assembly at 425 degrees Fahrenheit for 35 minutes until the pastry turns golden brown and the internal filling reaches a bubbling state.