Joshua 5:11

They ate some of the produce of the land the day after the Passover, including unleavened bread and roasted grain.

Leviticus 23:14

You must not eat bread, roasted grain, or fresh grain until this very day, until you bring the offering of your God. This is a perpetual statute throughout your generations in all the places where you live.

Exodus 12:18-20

In the first month, from the fourteenth day of the month, in the evening, you will eat bread made without yeast until the twenty-first day of the month in the evening.

Exodus 13:6-7

For seven days you must eat bread made without yeast, and on the seventh day there is to be a festival to the Lord.

Leviticus 23:6

Then on the fifteenth day of the same month will be the festival of unleavened bread to the Lord; seven days you must eat unleavened bread.

Treasury of Scripture Knowledge

Summary

Joshua 5:11

And they did eat of the old corn of the land on the morrow after the passover, unleavened cakes, and parched corn in the selfsame day.

Unleavened cakes

Exodus 12:18

Exodus 13:6

Leviticus 23:6

General references

Leviticus 26:10

Bible References

Unleavened cakes

In the first month, from the fourteenth day of the month, in the evening, you will eat bread made without yeast until the twenty-first day of the month in the evening.

For seven days you must eat bread made without yeast, and on the seventh day there is to be a festival to the Lord.

Then on the fifteenth day of the same month will be the festival of unleavened bread to the Lord; seven days you must eat unleavened bread.

General references

You will still be eating stored produce from the previous year and will have to clean out what is stored from the previous year to make room for new.