Start by preheating the oven to 400 °F (205 °C). In a large iron cast skillet, pour the olive oil and spread the diced bacon evenly over the skillet. Toss in washed and trimmed brussels sprouts.
Add sliced cherry tomatoes and sliced sweet peppers. Season with salt and pepper and give it a generous toss, making sure to cover all the Brussels sprouts in the olive oil. At the end, cut 1 bulb of garlic in half and place it in the middle of the iron cast skillet.
Roast the Brussels sprouts in the preheated oven for 20–25 minutes, stirring halfway through, until they are tender and lightly browned.
While the Brussels sprouts are roasting, cook the chicken sausages. Heat a large skillet over medium-high heat and add the sausages. Cook for 8–10 minutes, turning occasionally, until they are browned on all sides and cooked through.
Remove from the heat and slice the sausages into bite-sized pieces. Once the Brussels sprouts are roasted, remove them from the oven, give them a toss and remove the garlic bulb. Squeeze out the garlic onto a plate and mash it with a fork. Use as much mashed garlic as you want to taste the brussels sprouts. Leftover of mashed garlic can be used for garlic butter.
Warm the corn tortillas in the oven or on a skillet for a few minutes. Assemble the tacos and top with salsa, dollop of sour cream. Sprinkle with cilantro and a squeeze of lime juice. Add hot sauce as desired.