Preheat the oven to 350 degrees Fahrenheit. In a 9-inch square baking dish, mix together the strawberries, rhubarb, honey, arrowroot and lemon juice.
In a medium mixing bowl, stir together the oats, almond flour, sugar and salt. Mix in the butter and yogurt. Stir until all of the flour is incorporated and the mixture is moistened throughout.
Dollop spoonfuls of the oat mixture over the filling and use your fingers to break up the mixture until it is evenly distributed (no need to pack it down).
Bake for 40 to 45 minutes, or until the filling is actively bubbling around the edges and the top is lightly golden. Let the crisp rest for 10 minutes before serving. Serve with vanilla ice cream (I insist!). Leftovers will keep in the refrigerator, covered, for up to 4 days.