Pre-heat oven to 350°F
In a pot, combine rhubarb, strawberries, sugar, and lemon. Simmer until the fruit breaks apart and thickens to jam-like consistency.
In a bowl, combine oats, almonds, maple syrup, salt, eggs, milk, vanilla, and cinnamon.
In a 9x9 pyrex dish, pour the rhubarb mixture.
Top the rhubarb mixture with the oat mixture.
With a spoon, gently lift spoons of the rhubarb mixture from the bottom, to the top of the dish, to get the 'swirls' of fruit.
Bake for 20-25 min, or until set.
Serve warm, topped with greek yogurt and a drizzle of maple syrup.