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1
Prepare a grill or large grill pan for medium heat.
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2
Quarter the tomatoes, then slice each quarter into 1/2-inch-thick pieces.
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3
Combine with 1/4 teaspoon salt in a medium bowl; let sit at room temperature.
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4
Grate 3 of the garlic cloves into a 1-quart resealable bag.
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5
Add 1/4 cup of the oil, half the lemon zest and juice, and the chicken, and seal the bag tightly.
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6
Massage the marinade into the chicken, making sure it is evenly coated.
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7
Let sit at room temperature for 20 minutes.
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8
Meanwhile, grate the remaining garlic clove into the carafe of a blender.
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9
Add the avocados, scallions, 1/2 cup water, 1/3 cup of the oil, the remaining lemon zest and juice, 1/2 teaspoon salt and a few grinds of pepper, and puree until smooth.
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10
Place a piece of plastic wrap directly on top of the dressing, and refrigerate the carafe.
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11
Transfer the chicken to a plate or baking sheet, shaking off any excess marinade.
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12
Sprinkle liberally with salt and pepper.
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13
Place the chicken and the bacon on the grill.
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14
(Note: If you have a charcoal grill, cook the bacon in a grill pan.
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15
It should not be grilled over charcoal because of the risk of flare-ups.)
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16
Grill the chicken until charred on both sides and an instant-read thermometer inserted in the deepest part of each breast reads 165 degrees F, about 5 minutes per side; transfer to a cutting board, and let rest for at least 5 minutes.
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17
Grill the bacon, flipping as needed to ensure even cooking, until lightly charred on both sides and most of the fat has rendered, about 10 minutes; transfer to the cutting board.
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18
While the chicken rests, quarter the romaine hearts lengthwise, leaving some of the stem attached to each quarter.
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19
Brush the cut sides with the remaining oil, and sprinkle liberally with salt and pepper.
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20
Grill, cut-side down, leaving 1/2 inch of space between each quarter (do not crowd; grill in batches if needed), until 1 cut side is lightly charred, 30 seconds to 1 minute; turn and repeat for the other cut side; transfer to a cutting board, and let cool slightly.
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21
Cut into 1-inch pieces, and mound onto a large platter.
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22
Cut the chicken into 1/2-inch pieces, and crumble the bacon.
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23
Arrange the chicken, bacon, hard-boiled eggs, tomatoes (along with the juices) and blue cheese in rows on top of the romaine.
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24
When ready to serve, toss with the dressing, season with salt and pepper and serve immediately.