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1
Heat olive oil in heavy large pot over medium heat.
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2
Add onions; saute until almost tender, about 6 minutes.
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3
Mix in bell peppers and crushed red pepper; sprinkle lightly with coarse kosher salt.
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4
Reduce heat to low, cover, and cook until peppers are tender and silky, stirring occasionally, about 35 minutes.
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5
Stir in red wine vinegar, capers, oregano, and thyme.
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6
Increase heat to medium; stir uncovered 3 minutes.
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7
Season peperonata to taste with coarse salt and pepper.
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8
Transfer peperonata to bowl and cool to room temperature.
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9
DO AHEAD Can be made 3 days ahead.
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10
Cover and refrigerate.
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11
Bring to room temperature before serving.
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12
Mix oregano, thyme, pepper, and salt in small bowl.
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13
Sprinkle evenly over both sides of steak.
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14
Place on large plate; cover and refrigerate at least 4 hours and up to 6 hours.
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15
Let stand at room temperature 1 hour before grilling.
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16
Prepare barbecue (medium-high heat).
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17
Drizzle both sides of steak lightly with olive oil.
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18
Grill steak to desired doneness, about 15 minutes per side for medium-rare, or 17 minutes per side for medium.
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19
Transfer steak to cutting board; let rest 5 minutes.
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20
Cut steak crosswise into 1/4 - to 1/3 -inch-thick slices.
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21
Arrange steak slices on platter; surround with peperonata and serve.