Place the frozen steak fries on the prepared baking sheet and drizzle with the oil. Sprinkle with the cowboy rub and a pinch of salt. Toss the potatoes to coat and roast according to the package directions until golden brown and crispy.
Meanwhile, place a large nonstick skillet over medium-high heat. Add the ground beef and sprinkle with the barbecue spice blend and 1/2 teaspoon salt. Cook, stirring occasionally, until evenly browned, 8 to 10 minutes. Set aside.
Remove the cooked fries from the oven but leave on the baking sheet. Alternatively, you can transfer the cooked fries to a large cast-iron skillet for serving.
Set the oven to 375 degrees F.
Cover the fries evenly with the baked beans. Put the cooked ground beef on top of the beans and drizzle with the barbecue sauce. Sprinkle with 1/4 cup of the fried onion strings. Cover the onions with the Gouda.
Put the baking sheet or skillet back in the oven and bake until the cheese melts and the sauce bubbles, 5 to 7 minutes.
Sprinkle the baked poutine with the remaining fried onion strings, crumbled bacon and scallions. Serve immediately.
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