Slow Cooker Beef Lettuce Wraps with Quick Pickles

INGREDIENTS

Cooking spray

large onion, cut into 1/2-inch-thick slices

garlic cloves, crushed

1 1/2 tsp

canola oil

boneless chuck roast, trimmed

1/2 cup

unsalted beef stock

1/4 cup

lower-sodium soy sauce

11 tbsp

rice vinegar, divided

2 tbsp

dark sesame oil, divided

2 tbsp

brown sugar

2 tbsp

unsalted tomato paste

1 tbsp

white miso (soybean paste)

3/4 tsp

crushed red pepper

3/4 cup

thinly sliced English cucumber

3/4 cup

julienne-cut carrot

1 cup

water

1 tbsp

granulated sugar

3/4 tsp

kosher salt

Bibb lettuce leaves

2 tsp

toasted sesame seeds