Adverb
meltingly (comparative more meltingly, superlative most meltingly)
So as to melt, or seem to melt.
The steak was meltingly tender.
However, the results are surely worth it: the crust crumbles so meltingly in the mouth, as if it was holding together just enough to survive the journey to your lips. Source: Internet
It's chewy but still meltingly tender. Source: Internet
The duck leg itself was meltingly tender and soft, as was the spinach. Source: Internet
The sweetness of the well-cooked peas had entered the sauce, and the peas themselves were not mushy, but simply meltingly delicious. Source: Internet
This means, the peppers (a gas burner works fine), quickly the eggplants and zucchini until caramelized, and slowly the onions and garlic until meltingly tender. Source: Internet