Let's cook.
Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a medium bowl, combine the rolled oats, 2 tablespoons of honey, olive oil, and cinnamon. Stir until the oats are evenly coated.
Spread the coated oats in a single layer on the prepared baking sheet.
Bake for 10 minutes, or until golden brown and fragrant. Stir halfway through to ensure even toasting. Remove from oven and let cool completely.
While the oats cool, prepare your berries. If using frozen, thaw them slightly.
In two serving glasses or bowls, layer half of the Greek yogurt, followed by half of the mixed berries, and then half of the cooled honey-toasted oats.
Repeat the layers with the remaining yogurt, berries, and oats.
Drizzle with additional honey if desired and sprinkle with chopped pistachios, if using. Serve immediately.
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