I start by washing and cutting my rhubarb into small pieces and halving the strawberries. Tossing them with sugar, flour, cinnamon, nutmeg, and salt ensures every bite is perfectly seasoned and slightly thickened during baking.
In a separate bowl, I mix rolled oats, brown sugar, flour, and diced butter. I use a pastry cutter to combine them until the mixture looks like coarse crumbs. This step is key for that golden, crunchy topping.
I spread the fruit evenly in my baking dish and sprinkle the oat mixture on top. Making sure the topping covers all the fruit ensures each bite has that perfect crisp-to-fruit ratio.
I bake at 375°F (190°C) for about 40–45 minutes. The top should be golden brown, and the fruit should be bubbly and fragrant. The aroma alone makes it hard to wait!
I let it cool slightly before serving. It’s best warm, and a scoop of vanilla ice cream on top takes it over the edge.