Dice bacon into 1/2-inch pieces (this is easiest with cold bacon and a sharp knife!). Fry bacon in a large pan over medium heat until the fat renders and bacon is crisp. Using a slotted spoon, transfer to a paper-towel-lined plate to drain. Remove pan from heat and let cool about 5 minutes.
If there is more than 1 tablespoon bacon fat, pour it off the pan (see note 1).
Once the pan is cool, return it to medium heat. Add olive oil, garlic, and almonds and sauté over low heat until garlic is fragrant, about 1–2 minutes. Add trimmed and quartered Brussels sprouts and soy sauce.
Cook, stirring frequently, until the sprouts are tender, about 6–8 minutes. Season to taste with salt and pepper (I add 1/4 teaspoon each).
Stir in the bacon and serve warm.
Notes
Note 1: To drain off extra bacon grease, line a small cup or bowl with heavy-duty foil. Carefully pour bacon fat into the lined bowl immediately after removing bacon. Let this bowl stand at room temperature until bacon grease solidifies. At this point, you can fold the foil around it and discard it or save it to use in future recipes.Storage: Store leftovers in an airtight container in the fridge for up to 3 days. Reheat in a skillet over medium heat until warmed through.