Place the rhubarb in a bowl. Boil about 3 cups of water over the stove on medium high heat. Pour over the rhubarb, let stand 2 minutes and then drain and pat dry.
4 Cups Rhubarb
Prepare the topping. Mix the dry ingredients together and then chop the butter into bite sized pieces. Mix the butter into the dry ingredients until it begins to stick together in clumps. Set aside.
1 Cup Old Fashioned Rolled Oats, 1 Cup Brown Sugar, 3/4 Cup Flour, 1/2 teaspoon Cinnamon , 1/4 teaspoon Salt, 1/2 Cup Unsalted Butter
In a large bowl, add the rhubarb, strawberries, sugars, cardamom, lemon zest and ultra gel. Fold together and pour into a deep dish pie dish or an 8x8" baking dish that has been greased. You can even do a 9x13 but you will need to do 1.5 times the fruit filling mixture.
4 Cups Strawberries, 1/2 Cup Sugar, 1/2 Cup Brown Sugar, 1/4 teaspoon Cardamom, 3 Tablespoons Sure Gel Ultra Gel
Top with the crisp topping and bake at 350 for 30 minutes.