Step 1: Preheat your oven to 350°F. Line a large baking sheet with parchment paper. Spread out the strawberries on the sheet. In a small bowl, whisk together the balsamic vinegar and honey. Drizzle the mixture over the strawberries and toss to coat evenly. Spread them out in a single layer.
Step 2: Roast the strawberries until they start to soften and release their juices, which should take about 25 to 30 minutes. Let them cool.
Step 3: While the strawberries are cooling, pulse the feta in a food processor until it breaks down into small crumbs. Add the mascarpone and a pinch of pepper, then pulse until everything is well combined. With the processor running, slowly pour in the olive oil and blend until the mixture is smooth and fluffy.
Step 4: Transfer the whipped feta to a serving bowl. Top it with the cooled strawberries and basil, then drizzle with a bit more olive oil and season with pepper. Serve with crackers or toast on the side. Enjoy your delicious dip!