Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper. Toss strawberries with honey and 1/2 teaspoon vanilla. Spread in a single layer and roast for 20-25 minutes until soft and slightly caramelized. Let cool completely.
In a medium bowl, stir together ricotta, maple syrup, remaining 1/2 teaspoon vanilla, and salt until smooth. Gently fold in the cooled roasted strawberries.
Line a separate baking sheet with fresh parchment paper. Spread the ricotta mixture evenly to about 1/4-inch thickness. Sprinkle chopped pistachios over the top.
Freeze for at least 4 hours, or until firm. Break into irregular pieces and serve immediately. Store leftovers in the freezer.