Heat chopped rhubarb, strawberries, honey, and lemon juice in a saucepan over medium heat until the mixture is cooked down. Mash it down with a potato masher or the back of a fork to help the rhubarb break down. Simmer while stirring consistently for a few minutes to allow some more moisture to evaporate. Set aside to cool.
2 cups rhubarb, 3 cups strawberries, ⅓ cup honey, 1 teaspoon lemon juice
Reserve ⅓ cup of the rhubarb mixture for topping the dessert cups later.
In a blender, blend together the ricotta, cooked rhubarb mixture, and additional honey until smooth. Scrape down the sides and blend again if necessary.
14 oz ricotta, ⅓ cup honey
In a separate bowl, whip heavy cream with a hand mixer until stiff peaks form.
1 cup heavy cream
Gently fold the whipped cream into the ricotta mixture until thoroughly combined.
Spoon the mousse mixture into 6 oz dessert glasses. (Serves 6) Swirl some of the reserved rhubarb mixture on top or even add it between layers of mousse. Chill in the refrigerator for 4 hours.
Optional Garnish: Garnish with fresh mint leaves, a strawberry slice, a rhubarb curl, or a sprinkle of lemon zest before serving.