In a small saucepan, combine raspberries, 2 tablespoons honey, lemon juice, and lemon zest. Cook over medium heat, stirring occasionally, until raspberries break down and mixture thickens slightly, about 5-7 minutes. Remove from heat and let cool completely.
While the compote cools, preheat oven to 350°F (175°C). In a bowl, mix oats, almonds, melted butter, 1 tablespoon honey, and cinnamon until well coated.
Spread oat mixture on a baking sheet lined with parchment paper. Bake for 8-10 minutes, stirring halfway, until golden and fragrant. Remove and let cool completely.
In another bowl, stir together Greek yogurt, 2 tablespoons honey, and vanilla extract until smooth.
To assemble, spoon a layer of yogurt into the bottom of two glasses or jars. Add a layer of raspberry compote, then a sprinkle of oat crumble. Repeat layers, ending with a dollop of yogurt and a final sprinkle of crumble.
Serve immediately, or chill for up to 30 minutes before serving. Garnish with fresh raspberries and lemon zest if desired.