In a medium pot, heat the stock over medium low heat, then reduce heat to low and keep warm. (It needs to stay warm as we add it to the rice)
In a large, wide pan, melt butter and oil together over medium-high heat. Add the shallots and sauté until translucent, about 5 - 6 minutes.
Add a large pinch of salt and a pinch of pepper, then add rice and stir constantly for a few minutes, allowing oil/butter to coat the grains of rice.
Add the wine and cook for 2 – 3 minutes, stirring frequently.
Next, add a cup of stock to the rice and simmer until broth is almost absorbed. Add more stock, a cup (or ladle) at a time, allowing it to be absorbed before adding more. Add another pinch of salt and pepper. Stir frequently.
Cook until rice is creamy and tender, but still has a little texture, about 25 – 30 minutes.
Remove from heat and fold in cheese and langostinos, reserving a few for garnish on top. Sprinkle with fresh herbs, if desired and adjust salt and pepper, if needed.