If your oats aren't already toasted, toast them: place 1/2 cup rolled oats in a dry skillet over medium heat. Stir constantly for 4–6 minutes until they smell nutty and are light golden. Toasting drives off raw oat moisture and develops Maillard flavors, giving the parfait a warm, nutty crunch that contrasts beautifully with the cool yogurt.

Prepare the berries: hull and quarter any large strawberries so all berries are roughly the same size. Even-sized pieces give an elegant look in the glass and make each spoonful balanced.

Macerate the berries to coax out juices and intensify their sweetness: place the 2 cups mixed berries in a bowl, add 1 tablespoon honey (reserve 1 tablespoon for drizzling), the 1 tsp lemon zest (if using) and a small pinch (1/8 tsp) of kosher salt. Gently toss and let sit 5–10 minutes. Maceration softens the berries and creates a bright syrup that will meld into the yogurt for a cohesive flavor.

Flavor the yogurt: in a medium bowl, whisk the 2 cups Greek yogurt with 1/2 tsp vanilla extract (optional). The brief whisking aerates the yogurt slightly for a silkier mouthfeel and distributes the vanilla so every bite tastes balanced.

Fold in chia seeds: stir 1 tablespoon chia seeds into the yogurt or into the macerated berries (either works). Chia seeds add a pleasant gelled crunch and boost fiber and omega-3s. If you prefer a looser parfait, stir them into the berries so they absorb berry juices; for a thicker finished yogurt, mix them into the yogurt and let sit 2–3 minutes before assembling.

Sweetness check: taste the macerated berries and yogurt. If the berries need more sweetness, add up to the reserved 1 tablespoon honey, a little at a time. Balancing acidity and sweetness is key—too much honey will flatten the berry brightness.

Assemble the parfaits: in two clear glasses or bowls, layer visually—start with about 1/3 cup yogurt, then 2–3 tablespoons toasted oats, followed by 3–4 tablespoons macerated berries with some syrup. Repeat the layers ending with berries on top. Layering creates contrast between creamy, crunchy and juicy elements and makes the parfait visually appealing.

Finish and garnish: drizzle the remaining 1 tablespoon honey over the top, sprinkle a light pinch of extra toasted oats and a few whole berries for color. If using, shave a little extra lemon zest over the top. The honey adds gloss and a finishing sweetness that ties the layers together.

Serve or chill: serve immediately for maximum oat crunch. If you prefer a slightly softened oat texture, refrigerate for 10–15 minutes to let flavors meld. Leftovers keep 24–36 hours refrigerated; note the oats will soften further over time.