Stirfried Kohlrabi with Spring Onions and Bacon

4 ounces slab or thick-cut bacon, cut into small pieces
1 pound medium kohlrabies, peeled, cut into 1⁄3-inch-thick wedges, plus coarsely torn kohlrabi greens 6 scallions, white and pale-green parts only, cut into 1-inch pieces
3 garlic cloves, thinly sliced
1 tablespoon soy sauce
Kosher salt, freshly ground pepper
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Cook bacon in a large skillet over medium heat, stirring occasionally, until bacon begins to brown, 5–7 minutes; transfer to a bowl.
Increase heat to medium-high and cook kohlrabies in skillet, tossing occasionally, until golden brown, about 5 minutes. Add scallions and garlic and cook, tossing, until scallions are soft and garlic is golden, about 3 minutes. Add kohlrabi greens and 3 Tbsp. water and cook, tossing, until greens are tender, about 2 minutes. Add bacon and soy sauce and toss to combine; season with salt and pepper.