To finish and serve
Bring a large pot of well-salted water to a rolling boil. Cook the ravioli until tender, about 6 minutes (a bit longer if frozen). Drain gently. Warm the serving bowls while the ravioli cooks.
In a small skillet over medium heat, melt the butter and gently sauté the small crayfish tails 1–2 minutes until just opaque. Drizzle with lime juice and keep warm.
Arrange ravioli in the warmed bowls. Ladle over the masawa, lime basil, and dill velouté. Top each portion with a sautéed crayfish tail, a sprinkle of mongongo (or pine) nuts, and garnish with dill and onion flowers plus sprigs of dill and lime basil. Serve immediately.