Step 1

Preheat broiler. Line a large rimmed baking sheet with parchment paper.

Step 2

Combine beans, water, cumin, oregano and salt in a small food processor. Process until thick and smooth, about 1 minute. Set aside.

Step 3

Stir together tomato, jalapeño, onion, cilantro and lime juice in a medium bowl.

Step 4

Arrange rolls cut-side up on the prepared baking sheet; coat lightly with olive-oil spray. Broil until lightly golden and crispy, 1 to 2 minutes. Remove from oven. Divide the bean mixture among the 4 roll halves, spreading evenly; top with cheese. Broil until the cheese has melted, 30 to 45 seconds. Divide the pico de gallo evenly among the sandwiches.