Preheat a large heavy-bottomed pot over medium-high heat. Add the bacon and cook until crispy, about 3 minutes. Remove the bacon from the skillet with a slotted spoon to a paper towel-lined plate and reserve. Return skillet to the heat and add the EVOO, about 2 turns of the pan, to the bacon drippings.
Season chicken generously with salt and pepper. Arrange 1 cup of flour on a plate, add the chicken chunks and toss to coat. Shaking off excess flour, add the coated chicken to the skillet in an even layer. Brown 2-3 minutes on all sides. Remove to a plate and reserve. To the pot, add the onions, fennel, mushrooms and potatoes.
Saute for about 3-4 minutes until the vegetables start to soften. Add the butter and the remaining 2 tablespoons of flour to the veggies, stir to distribute and cook for 1 minute. Add wine and reduce liquid for 2 minutes. Add 2 cups of stock if you like a thicker consistency -- up to as much as 3 cups if you like it a little looser -- and bring it up to a bubble. Add browned chicken. Cover the pot, reduce heat to medium and simmer for 10-12 minutes, until the chicken is cooked through.
Add the chopped herbs and give it a stir to combine. Transfer to a serving platter, garnish with fennel fronds and bacon bits and serve with crusty bread alongside for mopping.