To make the cinnamon almonds, in a small skillet over medium heat, add 1 cup chopped almonds, 1 tablespoon sugar, and 1 teaspoon cinnamon. Cook, stirring occasionally until the sugar is melted and coats the almonds. Remove the almonds to a parchment-lined baking sheet and allow to cool.
To a large bowl, add 4 cups chopped red leaf lettuce, 4 cups chopped romaine lettuce, and toss to combine.
Add 1 cup blackberries, 1 cup blueberries, 1 cup raspberries, 1 cup sliced strawberries, and cinnamon almonds.
Poppyseed Dressing
In a medium bowl, add ½ cup olive oil, ¼ cup red wine vinegar, 2 tablespoons mayonnaise, 3 tablespoons sugar, and 1 teaspoon poppy seeds. Whisk to combine.
Pour the dressing over the salad and gently toss together until everything is evenly combined. Serve immediately.
Notes
Storage and Make-Ahead Instructions
Fridge: This salad is best the day it is made. If you aren’t going to eat all of the salad, dress only the portion you are serving and store the dressing separately in an airtight container in the fridge for up to 1 week.
Make Ahead: The dressing and cinnamon almonds can be made up to a week in advance. Prep your lettuce and berries a day in advance and then assemble and dress right before serving.