Dice two medium-sized strawberries and place in a saucepan with the rhubarb, pear and ½ cup water. Simmer, stirring occasionally, until the pear is soft (about 10-12 minutes).
Meanwhile, quarter the remaining strawberries. Also, combine the arrowroot, 2 teaspoons stevia and 2 tablespoons water in a small bowl.
When the pear is soft, add the arrowroot mixture to the fruit in the saucepan, keeping the heat on very low. Gently stir for 1-2 minutes, allowing the mixture to thicken and become more translucent (it won't be a fully translucent glaze because the rhubarb has disintegrated into the mixture.)
Take the pan off of the heat. Taste and add a little more stevia if you'd like. Immediately stir in the fresh strawberries. Pour into your baked pie crust. Refrigerate for at least 2 hours, then slice and serve. Or eat it sooner and let it be a little messy.