Simmer 1 cup diced rhubarb with 1/8 cup brown sugar and 1/2 cup water for 7 minutes.
Preheat oven to 350 degrees.
In a medium bowl, mix all wet ingredients together (simmered rhubarb including the water it simmered in, plus ingredients strawberries through greek yogurt)
In a separate large bowl, mix the dry ingredients together: flour, baking powder & soda.
Stir the wet and dry ingredients together.
Use non-stick stray and/or paper baking cups.
Bake in a muffin tin for 25 minutes, or until lightly browned. (makes 12 large muffins)
Top with buttercream frosting & strawberry slices.