Guava Custard Pie

4 eggs
1/2 can condensed milk
2 cups fresh whole milk
3 tablespoons granulated sugar
1 tablespoon lemon juice
6 medium guavas

Peel guavas, remove seeds. Cut into small pieces. Combine ingredients in order given: egg, milks, sugar, lemon juice and guavas. Pour into unbaked pie shell. Bake at 450 degrees F for 10 minutes. Reduce heat to 325 degrees F and bake 30 to 40 minutes longer until knife comes out clean.