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1
Heat oil in a small saucepan over medium-high heat until shimmering. Add ginger, garlic, and red pepper and cook until fragrant, about 1 minute. Stir in teriyaki sauce, 1/4 cup of pineapple juice, soy sauce, and brown sugar. Bring to a boil, then reduce heat to low and simmer for 5 minutes. Remove from heat and let cool.
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2
Pour half of marinade into a small bowl and whisk in remaining 1/2 cup pineapple juice. Reserve remaining marinade in saucepan as a glaze to be used during grilling. Place beef cubes in a large resealable plastic bag. Add marinade and seal bag, pressing out as much air as possible. Marinate, refrigerated, for at least 2 and up to 5 hours.
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3
Thread beef onto skewers, alternating with pineapple, onion, and bell peppers.
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4
When all the charcoal is lit and covered with gray ash, pour out and arrange coals on one side of the charcoal grate. Set cooking grate in place, cover grill and allow to preheat for 5 minutes.
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5
and
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6
the grilling grate. Grill skewers over direct heat until beef is well seared on all sides, about 3 minutes per side. Move skewers to cool side of grill and brush all over with reserved teriyaki glaze. Cover grill and continue to cook until center of beef registers between 125-130u00b0F on an instant read thermometer. Transfer skewers to platter and let rest for 5 minutes. Serve immediately.
