1 cup panko (Japanese breadcrumbs)
1/4 cup plus 2 tablespoons packed light brown sugar
2/3 cup plus 1/4 cup granulated sugar
1 1/2 teaspoons ground cinnamon
1/2 teaspoon ground allspice
1/4 teaspoon ground ginger
Pinch of ground cloves
5 stalks rhubarb, cut into 1-inch pieces (about 4 cups)
1 teaspoon fresh lemon juice
1/2 cup roughly chopped almonds with skins
4 tablespoons cold unsalted butter, cut into small pieces, plus more for the skillet
Strawberry ice cream, for serving