According to Catholic teachings, what was the First Temptation of Christ basically about?
Anyone can quote Scripture. Even the devil does! But the difference between his misuse and Jesus’ use of Sacred Scripture is that Jesus isn’t just proof texting. He invokes an entire passages by quoting a single line of Scripture.
4 Then Jesus was led by the spirit into the desert, to be tempted by the devil.
2 And when he had fasted forty days and forty nights, afterwards he was hungry.
3 And the tempter coming said to him: If thou be the Son of God, command that these stones be made bread.
4 Who answered and said: It is written, Not in bread alone doth man live, but in every word that proceedeth from the mouth of God. - Matthew 4:1-4
Depending on the Catholic references you are looking for, one will find this passage of Scripture used to support the follow:
A present, I can not locate the reference, but there is source out there that mentions that the First Temptation (possibly a Church Farther) was involving bread (food) because if the Devil can not make a person succumb to temptation with the basic necessities for the body, future serious temptations will most likely be fruitless. Notice that Satan did not lower the Temptations to other sensuous types of desires of the flesh (physical comforts, drink, or companionship) but asked for highest proud full hope that Jesus would adore him as God instead.
Pinnacle of the temple
"If thou be the Son of God, cast thyself down from hence: For it is written, 'He shall give his angels charge over thee, to keep thee: And in their hands they shall bear thee up, lest at any time thou dash thy foot against a stone.'" (Luke 4:9–13) citing Psalms 91:12.
Satan says, "All these things I will give you if you fall down and do an act of worship to me." Jesus replies "Get away, Satan! It is written: 'You shall worship the Lord your God and only Him shall you serve.'" (referencing Deuteronomy 6:13 and 10:20). Readers would likely recognize this as reminiscent of the temptation to false worship that the Israelites encountered in the desert in the incident of the Golden Calf mentioned in Ex. 32:4.
Temptation of Christ
The following may be of interest to some: