Preheat the oven to 400°F. Line a baking sheet with a silpat or parchment paper.
In a small bowl, combine 1 cup ricotta cheese, 1 tablespoon chopped parsley (or basil, sage, tarragon), a pinch or two of kosher salt, several turns of freshly ground black pepper, and grated Parmesan cheese. Taste and add more salt, pepper, or grated Parmesan if desired.
Lay one wonton wrapper flat on your work surface. Using a small spoon, place 1 teaspoon of the ricotta mixture in the center of the wrapper.
Roll the wrapper around the filling into a small tube, pressing the edges to seal. Place the roll seam-side down on the prepared baking sheet.
Repeat steps 3–4 with the remaining filling and the remaining fresh wonton wrappers (10–15 total).
Lightly brush each roll with olive oil so the edges can crisp.
Bake for 10–12 minutes, until the edges are golden and crispy and the centers have puffed.
To serve, spoon tomato sauce beside or over the mini cannelloni and top with parsley leaves, shaved Parmesan, and a few grinds of fresh black pepper.