In a large skillet, combine 2 tablespoons butter and 2 tablespoons canola oil.
Heat over medium-high heat until butter has melted, then add 1 pound of Brussels sprouts and 1 clove of garlic to the melted butter.
Cook and stir occasionally, until the Brussels sprouts soften and begin to brown, about 5–7 minutes. Spoon mixture over spinach in a large bowl.
Repeat process with remaining butter, oil, Brussels sprouts, and garlic.
After about 5–6 minutes of cooking, add the red bell pepper and green onion, stirring well. Spoon it into the bowl over spinach.
Add lemon zest and juice, red pepper flakes, Tabasco, salt, and pepper, tossing gently.
Serve warm.