The Lord's Prayer is taught in the Protestant catechisms, e.g.:
Luther's Small Catechism
Give us this day our daily bread.
What does this mean? God certainly gives daily bread to everyone without our prayers, even to all evil people, but we pray in this petition that God would lead us to realize this and to receive our daily bread with thanksgiving.
What is meant by daily bread? Daily bread includes everything that has to do with the support and needs of the body, such as food, drink, clothing, shoes, house, home, land, animals, money, goods, a devout husband or wife, devout children, devout workers, devout and faithful rulers, good government, good weather, peace, health, self-control, good reputation, good friends, faithful neighbors, and the like.
Heidelberg Catechism (Q125)
Q. What does the fourth petition mean?
A. “Give us this day our daily bread” means: Do take care of all our physical needs so that we come to know that you are the only source of everything good, and that neither our work and worry
nor your gifts can do us any good without your blessing. And so help us to give up our trust in creatures and trust in you alone.
Westminster Larger Catechism (Q193)
Q. What do we pray for in the fourth petition?
A. In the fourth petition (which is, Give us this day our daily bread,)
acknowledging, that in Adam, and by our own sin, we have forfeited our right to all the outward blessings of this life, and deserve to be wholly deprived of them by God, and to have them cursed to us in the use of them; and that neither they of themselves are able to sustain us, nor we to merit, or by our own industry to procure them; but prone to desire, get, and use them unlawfully:
we pray for ourselves and others, that both they and we, waiting upon the providence of God from day to day in the use of lawful means, may, of his free gift, and as to his fatherly wisdom shall seem best, enjoy a competent portion of them; and have the same continued and blessed unto us in our holy and comfortable use of them, and contentment in them; and be kept from all things that are contrary to our temporal support and comfort.
Calvin is too long to quote here but might be worth reading, as he discusses a few points mentioned in this and the other answers: