Preheat oven to 400 degrees.
In a large mixing bowl, add strawberries, rhubarb, sugar, orange juice, orange zest and cornstarch or tapioca. Mix and let stand for 10 minutes.
Roll out one disk and place it on the bottom of the pie plate. Let the dough slightly hang over the edge of the pie plate for fluting or crimping.
Add the filling to the pie plate.
Roll out the second disk and place it over the filling. Tuck the edges of the top dough under the edges of the bottom dough. Crimp with a fork or flute with your fingers to create a decorative edge. Crimping and fluting help to keep the juices from escaping through the edge of the pie crust.
Cut 4-5 slits in the top of the pie. This helps let the steam escape as it cooks.
Optional-for a shiny crust, using a silicone brush, brush on milk or beaten egg white, sprinkle with coarse sugar.
Bake at 400 degrees for 20 minutes. Check the pie, you may need to add a crust protector to prevent the crust from burning.
Cook for an additional 20-40 minutes. Pie is done if it is a nice brown color and the filling is thick and bubbling.
Quick Tip-If pie is browning too quickly, reduce oven to 350 degrees and cook for an additional 40-50 minutes.
Remove from oven and let cool.
Store in the refrigerator for up to 3 days.