Pour ½ tablespoon of oil into a medium skillet and place over medium-high heat. Add bacon and cook until crisp, 4 to 5 minutes. Strain with a slotted spoon and transfer to paper towels and set aside.
Drain grease and transfer skillet back to the stovetop. Add oil and sauté shallots for 2 minutes. Add garlic and rice and continue to sauté for 3 to 4 minutes or until a small white dot remains in the center of each grain of rice. Season with salt and pepper.
Deglaze pan with wine and stir. Allow almost all the liquid to evaporate then reduce the heat to medium and add ⅔ cup warm stock, stirring frequently.
Each time the liquid evaporates add another ladle of stock and continue to stir. Repeat until the rice is al dente, about 20 minutes. Season with salt and pepper.
Reduce heat to medium-low and add peas and bacon to the risotto. Cook for 3 to 4 minutes.
Stir in mascarpone, Parmesan and mint and continue to stir until smooth. Adjust seasonings.
Top with a little more grated Parmesan and lemon zest and serve.