Love Apple Rhubarb Crisp

Ingredients

• 4 large semi-tart apples, such as Pink Ladies, Honeycrisp, Cameos, or Fujis (1 1/2 pounds / 680 g, 4 cups prepared)
• 1 pound rhubarb, leaves trimmed away, in 1" slices (4-5 large stalks, 4 cups prepared)
• 1 teaspoon finely grated ginger root
• 1 teaspoon vanilla paste or extract
• 1/4 teaspoon fine sea salt
• 2 tablespoons all-purpose flour (or 1 tablespoon cornstarch)
• 1/2 cup (120 ml) maple syrup (more if your apples are very tart)
• 1 1/4 cups (110 g) old-fashioned rolled oats (gluten-free if needed)
• 1 cup (140 g) whole wheat, spelt, or all purpose flour (see variation for gluten-free option)
• 1/4 cup + 2 tablespoons (70 g) maple sugar (or brown sugar)
• 1/2 teaspoon cinnamon
• 1/2 teaspoon fine sea salt
• 8 tablespoons (113 g) unsalted butter, melted (Use plant butter for a vegan option. Omit salt if using salted butter.)
• 1/2 cup (55 g) coarsely chopped nuts, optional (sliced almonds, pecans, or walnuts)
• vanilla ice cream, for serving